Grease-gun.



. S. P. TOWNSEND.

GREASE GUN.

APPLIGATION FILED nur zs, 1910.

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' 20 easily grasped and held fromturning even 4 GREASE-GUN.,

-eeaoea Specification of Letters Patent;

Patented Jan. 31, 1911.

Applicationied January 25, 1910. Serial No. 539,922.

To all whom 'it mag/ v concern:

Be it` knownthat I, SAMUEL P. TowN- SEND, a citizen of the United States, -and a resident of' Orange, New Jersey, have in- 5' vented 'certain Improvements in Grease- Guns, of which the following is a specification.

One object 'of my invention is to provide a ease gun,.of the class described and 438,154, iled June-12, 1908, which shall beV so constructed that the solid lubricant adhering to' or projecting from the outside surface' of its inner member after it has been llilled, shall` be directed into and retainedv within its outer member when said two mem- .bers are put togethervpriorto their use.

I further 'desire to so construct the various parts of the grease gun that they may be though they may be "more or less greasy; it being also desired that each of the two members of the device shall be so' made as tov include a hand hold or'gripping portion.

Another object of the invention 'is to provide a device of the character,v described with a novel arrangementof parts for actuating. the piston and for mounting the various parts so as to permit of'their convenient and rapid manipulation under conditions of use.

These objects and other advantageous ends I secure -as hereinafter set forth reference being had to the accompanying drawings, in which Figure 1, -is a side elevation of the grease gun forming the subject of the present in vention; Fig. 2, is a vertical section Fig. 3, is a transverse'section on the line aa Fig. 2; Fig. 4, is a detached perspective'view showin the detail construction of the two parts o the grease gun; Fig. 5, isa perspective view of the piston, and Fig. 6, is a vertical section of a slightly modified form of grease gun.

In the above drawings, 1 representsthe outer cylinder which has a funnel shaped end 2 and at its other extremity is permanently closed by a fixed head 3. The end 2 is threaded for the reception `of a removable cover 4,v which, in that form of' the invention shown in Figs. 1 to 5 inclusive, has a central-opening through which loosely passes the nozzle or outlet spout 5. j `This latter may obviously have any 'of a numbeot` forms and h 'as a part of itssurface m11 ed as indicated at so as to provide a convenlent grip whereby it ma be held from turning. The inner end o this nozzle is screwed or otherwise attached to the head 6 of the` inner cylinder 7, which closely lits wlthin the outer cylinder and 'extends so that its head 8 is immediately adjacent to 'the head 3 of said outer cylinder. The head 6 of this inner cylinder 1s preferably langed, as indicated at 9," so that it can engage the edge of the cylinder l where it projects within the funnel shaped end 2 thereof. As shown best in Fig. 4, the inner cylinder has in its side an elongated opening 10 extending for ractically its entire length, in order to permit of the convenient introduction of y the lubricant, and it also has mounted axially ,within it a screw 11, which in this case is partly'carried in a bearing in the center of the head 8 of this inner cylinder.

Threaded on the screw 11 is a piston 12 which, as shown in Figs. 4 and 5, tightly fits Athe interior of the cylinder 7 and in addition has a radially projecting, segmental llange 13, which extends through the opening l() in the side of the inner cylinder and practically engages with the inner surface of the outer cylinder, so that when the inner cylinder is placed within the cylinder 1,- the lubricant cannot escape past said .piston when this latter is moved in said inner cylinder.

V*The end of the screw '11 projects through the head 8 of the cylinder 7, where it has fixed to it one member 14 of 'a clutch or coupling whose second member: 15 is carried by a short spindle 16 mounted in the head 3 of the outer cylinder l; the arrangement being such that when the inner cylinder is .placed within the outer cylinder, and the cover 4 is screwed upon the funnel shaped end 2 thereof, these two ends of the coupling engage each other and operatively connect the spindle 16 with the screw 11.

The operating handle is made in two parts 17 and 18 andv has the irst of these parts pinned or otherwise fixed to the spindle 16, while the second part, which is connected to the first partofthe handle by a pivot pin 19, is provided with two knobs 20 and 21 projecting from opposite faces of Vsaid part'. A spring 22,'mounted on thev part 17 of the handle, acts on the adjacent end 'of the part .18 soas to tend to hold said part ,y either inthe extended position shown l in' funnel shaped 2, or in the lfolded position shown in suitable tool, such as a paddle, the solid lubricant is introduced through theopening 10; it being understood thatv the piston 12 has previously been moved to a position adjacent to the head 8. After being illed, the inner cylinder is inserted within the outer cylinder, and any lubricant which may be adhering to its sides is collected in the end 2 of the'outer cylinder. Finally, when said cylinders have been brought into the positions shown in Fig. 2, the two clutch members 14 and 15 are connected with each otherand the flange 9 of the head 6 of the inner cylinder seats itself upon the end of the outer cylinder 1.

The cover 4 may then be screwed onto the.

threaded portion of this funnel shaped end, after which the lubricant may be applied to any desired part of a machine by such a revolution of the handle as will cause the piston 12 to be moved longitudinally of the cylinders toward the outlet-nozzle-. When the handle is in its extended position, a relatively great leverage is obtained for .forcing of the piston through the cylinders and the expulsion of the solid lubricant through the nozzle, while when the handle is folded it may be rapidly turned with great convenience to bring back the piston to a position adjacent to the head 8, after which the cylinder is ready for filling.

If desired, he removable cover of the outer cylinder may be applied at theend thereofhaving the handle, as in Fig. 6, instead of at the end having the nozzle, as in the' other figures, and for this purpose, the nozzle 5b is preferably mounted in and carried by one head 3"1 of the outer cylinder, while the inner cylinder isopen at its adjacent end.

As before, the outer cylinder l is provided with a funnel shaped end 2 and a cover 4 capable of fitting thereon, but inthis case the screw 11 isfiXed to an elongated spindle 16a projecting through a tubular extension 8" of the inner cylinder. This tubular extension is of such length as to permit of its being conveniently grasped by the hand be'- tween the handles-17 and 18 and the cover 4, so that said cover with the inner cylinder may be convenientlyheld while the latter is` being filled. It is obvious that in this form of the inventionit is not necessary to provide the couplings 14 and 1 5, since the screw is carried by the cover 8a attached to the inner cylinder and is also permanently connected to the spindle 16?.

If desired,-'a reducing nozzle or cap'ic may be employed upon the end of theV nozzle 5, andfin such case it is advisable to provide said reducing nozzlewith a milled portion 5d so that it also ma from turning even though 1t be greasy. 'The end of the main nozzle 5, for the reception of this auxiliary nozzle is preferably provided with a slight taperonto which the latternozzle lits so as to be held in'place by friction.

1. The combination in a grease gun of two cylinders of whichone tswithin the pther; a nozzle connected to one of the cyliners; forcing material therein out through said nozzle; and a handle for actuating said means; one of the ends of the outer c linder being funnel shaped; with a removab e cover connected to the inner cylinder andV itting said end'. A

2. The combination in a ease gun of two cylinders, one fitting wit in the other;

be tightly held means within the inner cylinder for.

a piston inthe inner cylinder; an outletl nozzle connected to one of the cylinders; means for actuating the piston to force thematerial from the inner cylinder out through said nozzle, and a removable cover for the outer cylinder; said parts including a gripping portion, other than the cover and the outer cylinder, connected1 to the inner cylinder and projecting outside of the gun.

3.y The combination in a grease gun of two cylinders of which one fits inside of the other; the'- outer cylinder having a funnel shaped end and being provided with a removable cover; a flanged head for the inner cylinder capable of tting into the funnel shaped end of the outer cylinder; said outer cylinder having a shouldered portion at its funnel shaped end in position to co-act with the flanged head of the inner cylinder; a nozzle for the grease gun; and means for forcing material from the inner cylinder out through the nozzle. I

V4. The combination in a grease gun of two cylinders one fitting within the other;

a nozzle connected to one of the cylinders;

a removable cover for the' outer cylinder; a piston in the inner cylinder; an operating screw for said piston; with an operating handle carried by the outer cylinder; and a coupling withinthe grease gun detachably connecting the handle to said screw.

5. The combination in a grease gun of two cylinders, one iittingwithin the other; '120 7. The combination in a grease gun of two cylinders, one fitting within the other; a piston within the inner cylinder; means for actuating said piston; a cover for the outer cylinder; and an outlet nozzle rigidly connected to the inner cylinder; said inner cylinder having a milled port-ion extending outside of the outer cylinder.

8. The combinationin a grease gun of tw'o cylinders fitting one inside of the other and having an outlet; a piston for the inner cylinder; means for actuating said piston to force material through the outlet; andl a tubular gripping extension connected to the inner cylinder.

9. The combination in a grease gun of two cylinders one fit-ting within the other; a cover for the outer cylinder; a nozzle rigidly connected to the inner cylinder and passing through said cover; and means for forcing material from the inner cylinder out through said nozzle.

10. The combination in a grease gun of two cylinders one fitting within the other;

the outer cylinder having a funnel shapedv end; the inner cylinder having a nozzle connected to its head adjacent said end; a cover for the outer cylinder detachably mounted on the funnel shaped end of the outer cylinder and longitudinally movable on the nozzle; with means for forcing material from the inner cylinder out through 

